not be surprised if it occasionally appeared in these circumstances. 
Definitely much rarer than the corresponding pattern of the young 
Franklin's Gulls, ' •’ * 
9. Freeze . Like the young Franklin's Gulls e 
iA * ♦ # i 
10. Squat , Like the young Franklin's Gulls. 
11. Head-bobbing. Takes thd place of Bowing in Franklin's Gulls. 
Obviously homologous in some sense, but quite different in physical form. 
Very similar, in physical form, to the Head-bobbing of adults of all species. 
From Erect to Hunched. No trace of real Low Oblique. 
12. Ruffle 
Franklin ' s Gulls 
Presents the same problem as the Ruffle of the young 
Can probably be explained along the same lines. 
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